Chuck.



L. E. wnrrou.

GHU-GK. APPLICATION IILED SEPT 28, 1907.

Patented Aug. 9,1910.

2 SHEETS-SHEET 1.

' INVENTOB WITNESSES L. E. W HITON.

GHUGK.

APPLIOATION 11mm) SEPT. 28, 1907.

966,630, Patented Aug. 9, 1910.

2 SHEETS-SHEET 2.

Fig. 6

WITNESSES INVENTOH Lucius .Wkzitoxy LUCIUS E. WHITON, OF NEW LONDON,CONNECTICUT.

CHUCK.

Specification of Letters Patent.

Application filed September 28, 1907.

Patented Aug. 9, 1910.

Serial No. 394,960.

To all whom it may concern:

Be it known that I, LUoIUs E. WHITON, a citizen of-the United States,residing at New London, in the county of New London and State ofConnecticut, have invented certain new and useful Improvements inChucks, of which the following is a specification.

My invention relates to improvements in chucks and particularly for usewhere high torque is required. In such cases, the work is sometimeslikely to slip and turn in the chuck.

It is my object to prevent this and to enable a better grip to beobtained without straining the jaws or the chuck body.

In its complete and preferred form, the invention contemplates a chuckbody with projecting jaws and a frame recessed to accommodate the jawsand provided with auxiliary clamping screws for the work. Screws arealso provided for mounting the frame on the jaws and thus securingadditional pressure on the work.

Figure 1, is a face view of a chuck with my improvements. Fig. 2, is apartial side view and section of the same. Fig. 3, is a back view of theframe. Fig. 4, is a side View of the same. Fig. 5, is a detail View ofthe end of a jaw partly in section. Fig. 6, is a detail view of the endof an auxiliary clamping screw.

I have shown the invention as applied to a universal jawed chuck withscroll adjustment. The body 1, has the regular jaws 2, 2, 2 adjusted asis customary in this type of chuck. Between the jaws are locatedauxiliary clamping screws 3, 3, 3, which are carried by a frame 4:. Thisframe is secured at a convenient point or points as at 5, 5, to thechuck body so as to allow the frame and body to expand and contractwithout injury to either. The back of the frame lies snugly against thebody, except where it is recessed as at 6, 6, 6, to allow for theprojecting edges 7, 7, 7, of the chuck jaws thus torsionally connectingthe frame to the jaws. In this way substantially all of the torsionalstrain applied through the screws 3, 3, 3, is taken up by the jaws.

- After the screws 3, 3, 3, are tightened, the screws 8, 8, 8 are set upso as to reinforce the jaws 2, 2, 2, and the action of the adjustingscroll 9. The sides of the frame 4, being straight between the setscrews 8, 8, 8 afford beam like truss actions so that the radialpressure of the jaws is thus increased without straining the chuck bodyor the scroll. The jaws may be recessed to receive the ends of thescrews as 8 in Fig. 5. The clamping screws are properly shaped on theends as shown in Fig. 6 to afford good gripping action.

WVhat I claim is:

1. In a chuck construction, a body, a series of jaws a frame surroundingthe jaws and reinforcing them at the rear and auxiliary clamping memberscarried by said frame, acting independently of said jaws.

2. In a chuck, a body, a series of jaws, a frame torsionally connectedwith said jaws and auxiliary clamping means carried by said frame.

3. In a chuck, a body, clamping jaws carried thereby, a frame carried bythe body, auxiliary clamping means carried by the frame, and set screwscarried by the frame cooperating with the jaws.

4, In a chuck, a body, jaws projecting therefrom, a frame recessed toreceive said jaws, and auxiliary clamping means carried by said framebetween the jaws.

5. In a chuck, a body, jaws carried thereby, a frame, means for securingsaid frame to the body and auxiliary clamping members carried by saidframe and alternating with the jaws.

6. As an article of manufacture a chuck attachment comprising a frame, aplurality of clamping members carried thereby, and devices carried bythe frame between the clamping members for coacting with the chuckja'ws.

7. As an article of manufacture a chuck attachment comprising an angularframe adapted to surround andreceive the ends of the chuck jaws,clamping devices carried by said frame adapted to coact with the jaws inthe angles of the frame and clamping members adapted to engage the work.

8. In a chuck, a body, a plurality of clamping jaws adjustable to andfrom the center, a frame surrounding the ends of the jaws forreinforcing them means for securing the frame to the body and meanscarried by said frame for independently engaging the different jaws.

9. As an article of manufacture, a chuck attachment comprising, a frameadapted to surround the chuck jaws, means carried thereby for engagingthe chuck jaws and means carried thereby between said engaging means forengaging and centering the work.

10. As an article of manufacture, a chuck attachment comprising, a framehaving receiving grooves in its back and jaw engaging set screws carriedby said frame substantially parallel with said grooves.

11. As an articleof manufacture, a chuck attachment comprising, a framehaving jaw receiving grooves in its back and jaw engaging set screwscarried by said frame substantially parallel with said grooves and workengaging screws carried by said frame between said jaw engaging screws.

12. In, a chuck, a body,a plurality of clamping jaws carried thereby andadjustable radially thereto, a frame surrounding said jaws, clampingdevices carried by said frame for reinforcing said jaws and workengaging devices located between said jaw clamping devices.

13. A chuckcomprising, a body, a set of jaws carried thereby, means forsimultaneously adjusting said jaws, a frame secured to said body andsurrounding and reinforcing said jaws and independently adjustable workengaging devices carried by said frame between saidjaws. .7 i

14. In a'chuck, a body, adjustable jaws carried thereby, a reinforcingframe secured to said body and extending over said jaws and jaw clampingscrews carried by said frame.

In testimony whereof I afiiX my signature in presence of two witnesses.

LUCIUS E. WHITON. 'Witnesses:

' L. G. STEBBINS,

J. H. GUMBLE.

